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letsgo.js
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/*!
* letsGo
* http://letsgojs.com/
*
* By: Cody Sherman <cody@beg.in> (codysherman.com)
*/
(function(window, document) {
'use strict';
let error = function() {
window.console.error.apply(window.console, arguments);
};
let letsGoRunning = false;
let letsGoQueue = [];
let letsGo = function(target, command, attribute, noOrder) {
let queueMatters = false;
let nextInQueue = function(lastOne) {
if (queueMatters && lastOne) {
letsGoQueue.shift();
if (letsGoQueue.length > 0) {
router(letsGoQueue[0][0], letsGoQueue[0][1], letsGoQueue[0][2]);
} else {
letsGoRunning = false;
}
}
};
let checkIfAttribute = function(element, attribute, attributeIsClass) {
if (!attribute || attributeIsClass) {
attribute = (attribute) ? attribute : 'letsGo-hide';
return (' ' + element.className + ' ').indexOf(' ' + attribute + ' ') > -1;
} else if (attribute.indexOf('=') > -1) {
attribute = attribute.split('=');
return (element.hasAttribute(attribute[0])) && (element.getAttribute(attribute[0]) === attribute[1]);
} else {
return (element.hasAttribute(attribute) && (element.getAttribute(attribute) === ''));
}
}
let findAnimateTime = function(times) {
if (times.indexOf(',') > -1) {
times = times.split(',');
for (let i = 0; i < times.length; i++) {
times[i] = Number(times[i].slice(0, -1));
}
times = Math.max.apply(null, times);
} else {
times = Number(times.slice(0, -1));
}
return times;
};
let alterAttribute = function(element, styles, add, attribute, attributeIsClass, lastOne) {
let command = (add) ? 'add' : 'remove';
if (attributeIsClass) {
let alterAttributeDone = function() {
element.removeEventListener('animationend', alterAttributeDone, false);
if (add) {
element.classList.add(attribute);
}
element.classList.remove(attribute + '-' + command);
element.classList.remove(attribute + '-' + command + '-active');
element.classList.remove('letsGo-animate');
nextInQueue(lastOne);
};
element.classList.add('letsGo-animate');
element.classList.add(attribute + '-' + command);
if (!add) {
element.classList.remove(attribute);
}
setTimeout(function() {
if ((styles.transitionDuration !== '0s') || (styles.animationDuration !== '0s')) {
element.classList.add(attribute + '-' + command + '-active');
let maxTransitionTime = findAnimateTime(styles.transitionDuration);
let maxAnimationTime = findAnimateTime(styles.animationDuration) * styles.animationIterationCount;
let maxTime = Math.ceil(Math.max(maxTransitionTime, maxAnimationTime)*1000);
setTimeout(alterAttributeDone, maxTime);
if (styles.animationDuration !== '0s') {
element.addEventListener('animationend', alterAttributeDone, false);
}
} else {
alterAttributeDone();
}
}, 0);
} else {
// let setTheAttribute = function() {
// element.setAttribute(attribute[0], attribute[1]);
// }
if (add) {
if (attribute.indexOf('=') > -1) {
attribute = attribute.split('=');
element.setAttribute(attribute[0], attribute[1]);
} else {
element.setAttribute(attribute, '');
}
} else {
if (attribute.indexOf('=') > -1) {
attribute = attribute.split('=');
element.removeAttribute(attribute[0]);
} else {
element.removeAttribute(attribute);
}
}
nextInQueue(lastOne);
}
};
let router = function(target, command, attribute) {
if (!target) {
return error('letsGo: missing \'target\' parameter.');
}
if (!command) {
return error('letsGo: missing \'command\' parameter.');
}
if (typeof target !== 'string') {
return error('letsGo: \'target\' parameter is not a string type.');
}
if (command !== 'show' && command !== 'hide' && command !== 'add' && command !== 'remove' && command !== 'toggle') {
return error('letsGo: \'command\' parameter is not the string \'show\', \'hide\', \'add\', \'remove\', or \'toggle\'.');
}
let targetType = null;
let attributeIsClass = null;
let lastOne = false;
if (target.charAt(0) === '#') {
targetType = 'id';
target = target.substring(1);
let element = document.getElementById(target);
if (element === null) {
return error('letsGo: no element of ' + targetType + ' \'' + target + '\' found on page.');
}
let styles = window.getComputedStyle(element, null);
if (command === 'show' || command === 'hide') {
if (attribute) {
return error('letsGo: using \'show\' or \'hide\' command can not have an \'attribute\' parameter.');
}
if (command === 'show') {
alterAttribute(element, styles, false, 'letsGo-hide', true, true);
} else if (command === 'hide') {
alterAttribute(element, styles, true, 'letsGo-hide', true, true);
}
} else if ((command === 'add') || (command === 'remove')) {
if (!attribute) {
error('letsGo: using \'add\' or \'remove\' command must also have an \'attribute\' parameter.');
}
if (attribute.charAt(0) === '.') {
attributeIsClass = true;
attribute = attribute.substring(1);
} else if (attribute.charAt(0) === '#') {
attribute = 'id=' + attribute.substring(1);
}
if (command === 'add') {
alterAttribute(element, styles, true, attribute, attributeIsClass, true);
} else if (command === 'remove') {
alterAttribute(element, styles, false, attribute, attributeIsClass, true);
}
} else if (command === 'toggle') {
if (attribute && attribute.charAt(0) === '.') {
attributeIsClass = true;
attribute = attribute.substring(1);
} else if (attribute && attribute.charAt(0) === '#') {
attribute = 'id=' + attribute.substring(1);
} else if (!attribute) {
attributeIsClass = true;
attribute = 'letsGo-hide';
}
if (checkIfAttribute(element, attribute, attributeIsClass)) {
alterAttribute(element, styles, false, attribute, attributeIsClass, true);
} else {
alterAttribute(element, styles, true, attribute, attributeIsClass, true);
}
}
} else {
let element = [];
if (target.charAt(0) === '.') {
targetType = 'class';
target = target.substring(1);
element = document.getElementsByClassName(target);
} else {
targetType = 'tag';
element = document.getElementsByTagName(target);
}
if (element.length < 1) {
return error('letsGo: no element of ' + targetType + ' \'' + target + '\' found on page.');
}
if ((command === 'show') || (command === 'hide')) {
if (attribute) {
return error('letsGo: using \'show\' or \'hide\' command can not have an \'attribute\' parameter.');
}
if (command === 'show') {
for (let i = 0; i < element.length; i++) {
let styles = window.getComputedStyle(element[i], null);
if (i === (element.length - 1) ) {
lastOne = true;
}
alterAttribute(element[i], styles, false, 'letsGo-hide', true, lastOne);
}
} else if (command === 'hide') {
for (let i = 0; i < element.length; i++) {
let styles = window.getComputedStyle(element[i], null);
if (i === (element.length - 1) ) {
lastOne = true;
}
alterAttribute(element[i], styles, true, 'letsGo-hide', true, lastOne);
}
}
} else if ((command === 'add') || (command === 'remove')) {
if (!attribute) {
error('letsGo: using \'add\' or \'remove\' command must also have an \'attribute\' parameter.');
}
if (attribute.charAt(0) === '.') {
attributeIsClass = true;
attribute = attribute.substring(1);
} else if (attribute.charAt(0) === '#') {
attribute = 'id=' + attribute.substring(1);
}
if (command === 'add') {
for (let i = 0; i < element.length; i++) {
let styles = window.getComputedStyle(element[i], null);
if (i === (element.length - 1) ) {
lastOne = true;
}
alterAttribute(element[i], styles, true, attribute, attributeIsClass, lastOne);
}
} else if (command === 'remove') {
for (let i = 0; i < element.length; i++) {
let styles = window.getComputedStyle(element[i], null);
if (i === (element.length - 1) ) {
lastOne = true;
}
alterAttribute(element[i], styles, false, attribute, attributeIsClass, lastOne);
}
}
} else if (command === 'toggle') {
if (attribute && attribute.charAt(0) === '.') {
attributeIsClass = true;
attribute = attribute.substring(1);
} else if (attribute && attribute.charAt(0) === '#') {
attribute = 'id=' + attribute.substring(1);
} else if (!attribute) {
attributeIsClass = true;
attribute = 'letsGo-hide';
}
for (let i = 0; i < element.length; i++) {
let styles = window.getComputedStyle(element[i], null);
if (i === (element.length - 1) ) {
lastOne = true;
}
if (checkIfAttribute(element[i], attribute, attributeIsClass)) {
alterAttribute(element[i], styles, false, attribute, attributeIsClass, lastOne);
} else {
alterAttribute(element[i], styles, true, attribute, attributeIsClass, lastOne);
}
}
}
}
};
let queueControl = function(target, command, attribute) {
setTimeout(function () {
letsGoQueue.push([target, command, attribute]);
if (!letsGoRunning) {
letsGoRunning = true;
router(letsGoQueue[0][0], letsGoQueue[0][1], letsGoQueue[0][2]);
}
}, 0);
};
if (noOrder || attribute === true) {
if (attribute === true) {
router(target, command);
}
else {
if (typeof noOrder === 'boolean') {
router(target, command, attribute);
} else {
error('letsGo: \'noOrder\' parameter is not a boolean');
}
}
} else {
queueMatters = true;
queueControl(target, command, attribute);
}
};
let api = function(target, command, classname, queue) {
// (target, command, classname, queue) -> sentence with no queue
if(queue) {
letsGo(target, command, classname, queue);
return api;
}
// (target, command, classname) -> sentence
if(classname) {
letsGo(target, command, classname);
return api;
}
// (target, classname) -> toggle class
if(command) {
letsGo(target, 'toggle' , command);
return api;
}
// (target) -> toggle show/hide
letsGo(target, 'toggle');
return api;
};
api.while = function(target, command, classname) {
// (target, command, classname) -> sentence
if(classname) {
letsGo(target, command, classname, true);
return api;
}
// (target, classname) -> toggle class
if(command) {
letsGo(target, 'toggle' , command, true);
return api;
}
// (target) -> toggle show/hide
letsGo(target, 'toggle', true);
return api;
};
api.add = function(target, classname) {
if(classname) {
return api(target, 'add', classname);
}
return api(target, 'remove', '.letsGo-hide');
};
api.remove = function(target, classname) {
if(classname) {
return api(target, 'remove', classname);
}
return api(target, 'add', '.letsGo-hide');
};
api.then = api;
window.letsgo = api;
})(window, document);